STORK TRONIC ST72-31.03, Manual

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Boundary alarm function (see fig. 5):
The alarm contact is closed if the process
temperature is above the upper or below the lower
boundary value.
Fig. 5: Boundary alarm, rel. boundaries
Range alarm function (see fig. 6):
Opposite switching behaviour to the boundary
value alarm. The alarm contact is closed if the
actual value remains between the boundary
values
.
Fig 6: Range alarm, abs. boundaries
P32: Hysteresis alarm circuit
Hysteresis is set symmetrical at the adjusted limit value, i.e. half of the hysteresis’ value is effective below
and half of the value above the switching point
Third control level, (A parameters):
Setting of control parameters
Access to the third control level is granted when selecting the last P-parameter on the second control level.
Continue to press the UP key for approximately 10 seconds until “PA” appears. Continue to press the UP
key and additionally press the DOWN key for about 4 seconds and the first A-parameter of the third control
level is indicated.
With the keys UP and DOWN you can scroll the list in both directions. Pressing the SET key will give you the
value of the respective parameter. By pressing the UP or DOWN key at the same time the value can be
adjusted.
Return to the initial position takes place automatically, if no key is pressed for 60 seconds, or by
simultaneously pressing the UP and DOWN key for approx. 4 seconds.
Para-
meter Function description Adjustment range Standard
setting Custom
setting
A1 Switch mode contact K1 0: heating contact
1: cooling contact 0
A2
Switch mode contact K2 0: heating contact
1: cooling contact
1
A3 Function of contact K1 at
sensor error 0: relay off
1: relay on 0
A4 Function of contact K2 at
sensor error 0: relay off
1: relay on 0
A5 Selection setpoint 2 or DeltaW 0: operation with setpoint 2
1: operation with DeltaW
1
A8 Display mode
(all parameter indications are
presented in 0.1°K) 0: integrals, without leading zero
1: with decimals without leading zero
2: integrals, with leading zero
3: with decimals and leading zero
1
A9 Weighing factor 0.50 ... 2.50 1.00
A10
Indication value for lower
value linear analogue input -99...999 0,0
A11 Indication value for upper
value linear analogue input -99...999 100
A19 Parameter lock 0: no lock
1: A-parameter locked
2: A- and P-parameter locked 0